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I am sure if you show Pratt&Miller a boat of $ they can surely accommodate you I think?
When Corvette Racing transitioned from GT1 to GT2, I recall seeing a GT1 car for sale for $625k on the (I think) Pratt & Miller website. I don't recall if it went to a collector or to an overseas team. Don't forget, several of the cars have wound up in Europe or Asia to run in various GT series over there.